Keypad assembly and portable electronic device using the same

Abstract

A keypad assembly ( 20 ) for use in a portable electronic device ( 200 ) is provided. The keypad assembly includes a keypad ( 205 ), a light-guiding board ( 203 ), at least one light-emitting source ( 204 ), a light-shielding member ( 202 ). The keypad includes a first peripheral wall. The at least one light-emitting source is disposed proximate to a second peripheral sidewall ( 2031 ) of the light-guiding board and respectively aligned with the light-guiding board. The light-shielding member includes a main portion ( 2021 ) and at least one extending portion ( 2022 ) extending from the main portion. The at least one extending portion is configured for shielding light emitted from the at least one light-emitting source diffusing toward the first peripheral wall.

1 . A keypad assembly for use in a portable electronic device, comprising:
 a keypad comprising a first peripheral wall;   a light-guiding board comprising a second peripheral wall, the second peripheral wall corresponding with the first peripheral wall;   at least one light-emitting source disposed proximate to the second peripheral wall of the light-guiding board and respectively aligned with the light-guiding board; and   a light-shielding member disposed between the keypad and the light-guiding board, the light-shielding member comprising a main portion and at least one extending portion, the at least one extending portion extending from the main portion, the main portion configured for allowing light emitted from the light-emitting source to penetrate through the light-guiding board to illuminate the keypad assembly, and the at least one extending portion configured for shielding light emitted from the at least one light-emitting source and diffusing toward the first peripheral wall.   
   
   
       2 . The keypad assembly as claimed in  claim 1 , wherein the at least one light-emitting source is two light-emitting sources, the two light-emitting sources being disposed on a side of the light-guiding board, and the at least one extending portion being one extending portion. 
   
   
       3 . The keypad assembly as claimed in  claim 1 , wherein the keypad comprises a plurality of key buttons formed therewith, the main portion of the light-shielding member having a plurality of through grooves defined therethrough respectively corresponding to the key buttons, and the light-guiding board having a plurality of through apertures defined therethrough respectively corresponding to the key buttons. 
   
   
       4 . The keypad assembly as claimed in  claim 3 , wherein the key buttons respectively engage through the through grooves and the through apertures. 
   
   
       5 . The keypad assembly as claimed in  claim 3 , wherein each key button comprises a cover, a main body, and a protruding portion, the main body having an attaching surface formed thereon, the cover attached with the main body, and the protruding portion formed on the main body opposite to the attaching surface. 
   
   
       6 . The keypad assembly as claimed in  claim 5 , wherein the cover is adhered with the main body. 
   
   
       7 . The keypad assembly as claimed in  claim 1 , wherein the light-shielding member is a lighttight film. 
   
   
       8 . A portable electronic device, comprising:
 a housing; and   a keypad assembly assembled with the housing, comprising:
 a keypad comprising a first peripheral wall; 
 a light-guiding board comprising a second peripheral wall, the second peripheral wall corresponding with the first peripheral wall; 
   at least one light-emitting source disposed proximate to the peripheral wall of the light-guiding board and respectively aligned with the light-guiding board; and   a light-shielding member disposed between the keypad and the light-guiding board, the light-shielding member comprising a main portion and at least one extending portion, the at least one extending portion extending from the main portion, the main portion configured for allowing light emitted from the light-emitting source to penetrate through the light-guiding board to illuminate the keypad assembly, and the at least one extending portion configured for shielding light emitted from the at least one light-emitting source and diffusing toward the first peripheral wall.   
   
   
       9 . The portable electronic device as claimed in  claim 8 , wherein the at least one light-emitting source is two light-emitting sources, the two light-emitting sources being disposed on a same sidewall of the light-guiding board, and the at least one extending portion being one extending portion. 
   
   
       10 . The portable electronic device as claimed in  claim 8 , wherein the keypad comprises a plurality of key buttons formed therewith, the main portion of the light-shielding member having a plurality of through grooves defined therethrough respectively corresponding to the key buttons, and the light-guiding board having a plurality of through apertures defined therethrough respectively corresponding to the key buttons. 
   
   
       11 . The portable electronic device as claimed in  claim 10 , wherein the key buttons respectively engage through the through grooves and the through apertures. 
   
   
       12 . The portable electronic device as claimed in  claim 8 , wherein the light-shielding member is a lighttight film.